Joint construction



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1,690,047 F. c. ARMBRUsTl-:R

JOINT oNsTRcTIoN Enga sept.25, 1926 ATTORNEYS Patented Oct.` 30,192.8.

UNITED [STATES- 1,690,047 PATENT OFFICE.

rnnn c. AmnUs'rnn, orsnnnvnron'r, LoUIsIANA, .assIeNonv 'ro THE snfrnwns'r- EBN PIPE -JoIN'r a ENGINEERING co., or4 BIRMINGHAM, ALAIsmA,\ A confou- TION 0l ALABAMA..

JOINT CONSTRUCTION;

Appneaaon med september 23,1926. serial N. 137,314.

, This invention relates to an improved joint construction 'particularly adapted for use with the bell and spigot type of joint used on cast iron or steel pipe and bolted coupling joints althou h, of course, adapted forother uses and app ications.

The object ofthe invention is to provide a joint of this character whichis all the more effectively sealed whensubjected to the 'pressure of liquids or gases tending toI escape through the joint and thereby preventing leakage and maintaining a fluid-tight joint.

A further object is to provide a joint having these advantages and capacities and portion will be expanded to increase the eiliciency of itsfpacking engagement with the portions of thebell and spigot or other parts which it packs.

Other objects and advantages reside-in certain novel features'of the. construction,

I arrangement and combination of parts which will be hereinafter more ullydescribed and particularly pointed out in the appended claims, reference being had to the` accompanying drawings forming specification, and in which:

Figure 1 is a fragmentary view in vertical section showin the coupling'joint of the bolted type em ying the present invena part of this Figure -2 is a view showing another emhodiment of theI invention 'as used with-bell and spigot pipe, f A 4 Figure 3 isarview` showing a-somewhat 'i modified joint fof 'the type illustrated in Fig.

2, and j V Figures 4 and 5 are detail views of therub- -employed in Figsl, 2 and 3, re'- SpctivylReferring `to ticularly -to the drawings and more par-`V des pipe ends. which extend finto a ody Figs. .1 and 4, the numeral 1 coupling sleeve 2 having bells 3 at its opposite ends. Ineach bell 3 an elastic packing ring, designated generally at 4, is provided, the elast-ic packing ring 4 being constructed of rubber and having a body portion 5 and -oppositely directed pairs of wlngs, one pair of'cwings being designated at` 6 and the other pairo 'winds being designated at 7. The inneikpaino wings 6 of each elastic or rubber packing ring 4 bears against an annular expanding member -8 which engages the shoulderofthe bell and which acts as a base against Whichfthe ring 4 is pressed and expanded. The outer pair of wings 7 are expanded and covered by a combined sealing and expanding ring 9 of lead or other suitable material, thev ring 9 serving not only.

to expand the wing 7 lof thering 4 but alsol serve to completely `seal \and shut oli' the velastic packing ring from the air and thereby serving to greatly prolong the life thereof.

The combined sealing and ex anding rings 9 of the opposed bells are rmly pressed 'against their elastic packing rings 4 by means of annular followers 10 drawn together by bolts 11 and nuts 12. 'It is to be understood, however, that if the combined Asealing and expanding rings 9 are poured having a bell 13 into which the spigot end 14 of an adjacent pipe is introduced. ,In this form of the invention the lelastic packing member 4 is expanded by expandin members L 15 andlf. The member 15 may of lead while the member 15* is'formed of jute. Below the expanding memberl jute packing 16 may be provided and above the expanding member 15 a sealin strip 'of lead or other sultable material, designatedat 17 is ar-l ranged. Figs. 1, 2 and 4 show the elastic. j 'i packing member of tubular form or of general H-shaped form. As shown in Figs. 3-

land ,5 the acking member may in some apofthe single type in which event plications U-shape form. As-

it is of ap roximatelv illustrated 1n Fig. 3 t e joint consists ofa i pi e having ,a bell 20 into which the spigot en 21 of another 'pipeis introduced. Jute packing 22 is provided between the bell and j spigogand-Qn top of thejute packing 22 an ioo elastic sealing member 23 is positioned, the elastic sealing member 23 being of substantially U-shapcd form and having a body portion 24 and slightly divergent wings 25. The elastic packing member Q3 which may be of rubber or any other elastic material is expanded by a tapered expanding member 26 which may be of lead or any other suitable metal or alloy. The expanding member 2G may be held in position by a sealing member 27 of lead which may have a flange Q8 integral therewith and having interlocking engagement witl. a groove 29 provided in the wall 1l. In all forms of the invention pressure of the escaping fluid or of the fluid that tends to escape serves only to more effectively expand and tighten the packing since the wings of the elastic packing member being diverging and influenced by expanding members are subjected to a greater spreading action when subjected to fluid pressure..

I claim 1. A joint of the bell and spigot type having a fibrous packing, an elastic ring above,

said packing including a body portion and divergent wings extending upwardly from the body portion, a tapered lead expanding strip positioned between the divergent wings, and a sealing ring of cast lead above said expanding strip.

2. A joint of the bell and spigot type including fibrous packing engaged with the bell and spigot, an elastic ring above said fibrous packing and having a body portion, oppositely directed pairs of diverging wings, the lower pair of diverging wings being engaged and expanded by convolutions of' fibrous packing, a tapered lead expanding strip cooperable with the upper pair of diverging wings, and a cast lead sealing ring above said lead expanding strip.

3. A joint ot the bell andspigot type having a ring of rubber including a body portion, wings extending from the body portion, an expanding member co-operable with the wings, fibrous packing co-operable with the ring of rubber, and means for holding the expanding member, ring and fibrous packing in position.

` FRED C. ARMBRUSTER. 

